74VHC112SJX

Overview

The Fairchild Semiconductor 74VHC112SJX is a dual J-K flip-flop from the 74VHC series, housed in a 16-SOP package. It features negative-edge triggering with asynchronous preset and clear inputs. The device operates on a supply voltage range of 2 V to 5.5 V, supporting an extended industrial temperature range of -40°C to +85°C. Key electrical parameters include a maximum propagation delay of 10.5 ns at 5 V with 50 pF load capacitance, a clock frequency of 185 MHz, and complementary outputs capable of sourcing and sinking 8 mA. Static current consumption is low at 2 µA.

Feature Summary

• Dual independent J-K flip-flops with negative-edge clock triggering
• Asynchronous preset and clear functions for immediate state control
• Complementary differential outputs for signal integrity
• Wide operating voltage range compatible with 2V to 5.5V systems

Applications

• High-speed digital data storage and register circuits
• Frequency division and counter logic designs
• State machine implementation in embedded systems
• Parallel-to-serial data conversion interfaces

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to obsolete status. Confirm RoHS compliance and moisture sensitivity level (MSL 1) prior to assembly. Review datasheet specifications for pinout compatibility and thermal management requirements to ensure reliable integration into target PCB layouts.

Selection Notes

Select this component for applications requiring high-speed operation up to 185 MHz and wide voltage flexibility. Compare against similar VHC series parts for package availability and lead time constraints. Ensure input voltage levels align with system logic standards to prevent undefined states during operation.

Part Context

This part belongs to the 74VHC family of high-speed CMOS logic devices. It serves as a successor to older TTL-compatible logic families, offering improved speed and lower power consumption. The 74VHC112 specifically addresses design needs for compact, high-density digital logic solutions requiring dual flip-flop functionality in surface-mount packages.

Replacement Considerations

Direct substitutes include the SN74VHC112NSR from Texas Instruments and the 74VHC112MX from onsemi. Verify pinout compatibility and electrical parameter equivalence before substitution.